Automatic return mechanism for an exposure trim assembly

ABSTRACT

An automatic return mechanism for a manually adjustable trim assembly is provided for use in conjunction with a foldable camera having an automatic exposure control system. The camera includes a number of housing members interconnected for movement between an erected configuration and a folded configuration for convenient carrying and storage. The automatic return mechanism is disposed within one of the housing members and operates in response to return of the camera into its folded configuration.

United States Patent [191 Douglas Feb. 19, 1974 AUTOMATIC RETURNMECHANISM FOR AN EXPOSURE TRIM ASSEMBLY [75] Inventor: Lawrence M.Douglas, South Easton, Mass.

[73] Assignee: Polaroid Corporation, Cambridge,

Mass.

[22] Filed: Oct. 25, 1972 [21] Appl. No.: 300,819

52 us. cI.l 354 192, 354/30 [51] Int. CL... G03b 19/00, G03b 17/04, G03b7/00 [58] Field of Search... 95/11 R, 10 C, 39, 32, 64 D;

[56] References Cited UNITED STATES PATENTS 2,034,978 3/1936 Goldhammer95/39 2,184,017 12/1939 Mihalyi ..95/39 Primary Examiner-Robert P.Greiner Attorney, Agent, or Firm-Stanley H. Merviset al.

[57] ABSTRACT An automatic return mechanism for a manually adjustabletrim assembly is provided for use in conjunction with a foldable camerahaving an automatic exposure control system. The camera includes anumber of housing members interconnected for movement be tween anerected configuration and a folded configuration for convenient carryingand storage. The automatic return mechanism is disposed within one ofthe housing members and operates in response to return of the camerainto its folded configuration.

15 Claims, 4 Drawing Figures SHEET 2 BF 3 PAIENTEDFEB 1 91914 AUTOMATICRETURN MECHANISM FOR AN EXPOSURE TRIM ASSEMBLY BACKGROUND OF THEINVENTION Automatic return mechanisms for a manually adjustable trimassembly have been previously disclosed in a copending application forUnited States Patent entitled An Automatic Return Mechanism for aManually Adjustable Trim Assembly by Edwin H. Land and Lawrence M.Douglas, filed Apr. 24, 1972 and assigned to the assignee of the presentapplication. This case relates to an improvement of the abovementionedapplication. I

SUMMARY OF THE INVENTION The present invention is addressed to animproved automatic return mechanism for a manually adjustable trimassembly as provided in conjunction with a foldable camera having anautomatic exposure control system.

The invention is employed in conjunction with a camera having a numberof housing members interconnected for movement between an erectedconfiguration for forming an exposure chamber, and a foldedconfiguration for convenient carrying and storage.

An exposure control housing, formed as one of the housing members, ispivotally coupled to the front of the camera. The exposure controlhousing contains the electronic components of the cameras automaticexposure control system for regulating the exposure of photosensitivematerial contained within the camera. Also included within the exposurecontrol housing is a manual trim assembly, providing the camera userwith about a two stop optional exposure adjustment above or below theexposure value established automatically.

The trim assembly is configured having a trim reset plate pivotallymovable in response to the manual adjustment of the trim assembly awayfrom its predetermined normal position. Adjustment of the trim assemblyout of its normal position causes an extension of the reset plate toprotrude to the bottom of the expo sure control housing. When the camerais foldably collapsed, a tangential cooperation is established betweenthe extension of the reset plate extending slightly below the exposurecontrol housing and a portion of one housing member. This engagementprovides a force which is operative to rotate to reset plate to aposition in which it is above thebottom of the exposure control housing.This latter position represents the predetermined normal position of thereset plate. Due to linkages within the trim assembly, return of thereset plate to its normal position returns the trim assembly to itsnormal position. Accordingly, the trim assembly is automaticallyreturned to a predetermined normal position in response to the foldingof the camera.

One feature and object of the present invention is to provide anautomatic normal return mechanism for a manually adjustable trimassembly used in conjunction with a foldable camera having anautomaticexposure control system.

Another feature and object of the present invention is to provide aphotographic apparatus including foldable housing members movablebetween erected and collapsed configurations; an exposure control systemdisposed within at least one of the housing members,

members the exposure control system including a manually adjustable trimassembly bidircctionally movable from a predetermined normal positionfor regulating the responsiveness of the control system; and a trimreset mechanism unidirectionally movable in response to saidbidirectional movement of said trim assembly for automatically returningthe trim assembly to its normal position in response to the movement ofthe housing from their erected configuration to their foldedconfiguration.

Other objects of the invention will in part be obvious and will in partappear hereinafter.

The invention accordingly comprises the apparatus possessing theconstruction, combination of elements and arrangement of parts which areexemplified in the following detailed disclosure, and the scope of theapplication of which will be indicated in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS For a fuller understanding of thenature and objects of the invention, reference should be had to thefollowing detailed description taken in connection with the accompanyingdrawings wherein:

FIG. 1 is a pictorial representation of a single-lens reflex cameraaccording to the invention shown in its erected shape with portionsbroken away to reveal internal structure;

FIG. 2 is a side elevational fragmentary view of the camera of FIG. 1;

FIG. 3 is a front elevational fragmentary view of portions of the cameraof FIG. 1; and

FIG. 4 is an exploded perspective of the trim assembly of the camera ofFIG. 1.

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, an automaticcamera incorporating the features of the present invention isillustrated generally at 10. Camera 10 is shown in an erectedconfiguration suited for exposing a photosensitive film unit containedtherein. The camera 10 structure includes a bottom housing section 12, arear housing section 14, a top housing section 16 and a front exposurecontrol housing 18. Sections I2, 14, 16 and 18 are pivotally linked toeach other about respective hinge axes 20, 22, 24 and 26 and are movablebetween the erected configuration of FIG. 1 and the compact foldedconfiguration shown in FIG. 2.

When erected, sections l2, l4, l6 and 18 cooperate to define four sidesof a six-sided exposure chamber 28, the remaining sides of the chamberbeing enclosed by a flexible bellows 30 constructed of any suitableopaque material. Note that in the erected configuration, rear housingsection 14 is supported by erecting linkages as at 32 in a positionangularly extending from bottom section or base 12 at axis 20. As aresult of this connection, top section 16 is angularly oriented betweenhinges 22 and 24 to form an upper surface of the exposure chamber.

Positioned upon top housing section 16 is a viewfinder apparatus showngenerally at 34. Viewfinder 34 and its related internal components aredescribed in detail in a copending application for United States Patentby James G. Baker, entitled Reflex Camera and Viewing Devicez, Ser. No.98,356, filed Dec. 15, I970 and assigned in common herewith. Viewfinder34 is constructed having mutually movable componcnts which permit itserection (see FIG. 1) and its collapse (see FIG. 2).

When camera is erected, exposure control housing 18 is withdrawn fromits nested orientation within base 12 (see FIG. 2) and is moved so as toposition an optical-taking lens assembly 36 for making an exposure.During its erection, exposure control housing 18 is rotated about axis26, located along a forward portion of base 12. Pivotal support forhousing 18 is provided by a hinge bracket 27 fixed to a rear casting 140of housing 18. Hinge bracket 27 is configured having a generallyC-shaped extension on each side of camera 10 as at 29 (see FIG. 2).Extension 29 is bored at its lower extremity as at 25. A pin 31 extendsthrough bore and into a second bore (not shown) formed within a bracket33. Bracket 33 is fixedly attached to an inner frame member 35positioned within camera 10.

Base 12 is configured at the bottom of exposure chamber 28 to receiveand support a disposable filmretaining cassette structure, a portion ofwhich is shown at 38 in FIG. 2. Cassette structure 38 is of arectangular configuration and retains a plurality of stacked film units,the uppermost one of which is positioned in coincidence with theexposure plane of camera 10. Formed on the forwardmost peripheral sideof cassette 38 is an egress opening or slot 40 through which theuppermost film unit is removed for processing following its exposure.

Described in detail in a United States Patent by Edwin H. Land, US. Pat.No. 3,415,646, entitled Novel Photographic Products and Processes, thefilm units contained within cassette 38 include all the materialsnecessary to produce positive photographic prints. A rupturablecontainer of processing fluid (not shown) secured to the photosensitivecomposite is located in a position such that it may be easily withdrawnthrough slot 40. Upon exiting through slot 40, the uppermost film unitis engaged by a pair of pressureapplying rollers 42 and 44. Rollers 42and 44 are supported for rotation by a supporting structure 136 (seeFIG. 2), secured to base 12. Supporting structure 136 includes aU-shaped roller bracket 138 to which rollers 42 and 44 are connected.Bracket 138 is configured having a lower portion 134, the function ofwhich will be discussed below. Upon engaging the film unit, rollers 42and 44 rupture the container of processing fluid and dispense the samealong the photosensitive composite.

Pivotally connected to the forwardmost portion of base 12 is a lightbaffle member 135. A spring (not shown) is connected between bafflemember 135 and its pivot for automatically erecting member 135 whencamera 10 is erected. This status is best shown in FIG. 1. When erected,baffle member 135 provides a light shield or shade for the exiting filmunit. The exiting film unit passes through an exit slot 139 (see FIG. 2)provided at the forwardmost bottom portion of base housing 12. Due tothe specific configuration of the film unit, shading is necessary inorder to prevent actinic light from piping" through the film unit andclouding that portion of the film unit which has not yet passed throughrollers 42 and 44. Located on the rear ward portion of baffle member 135is an extension or bump 137, the exact function of which will becomemore apparent below. For a fuller understanding of the nature andoperation ofbaffle member 135, reference should be made to a copendingapplication of United States Patent entitled Self-Developing CameraSystern by Richard R. Wareham and Richard Paglia, Ser. No. 246,703,filed Apr. 24, 1972 and assigned in common herewith.

Exposure control housing 18, positioned at the front of camera 10,contains all the necessary components for controlling the exposure ofphotosensitive material. These components generally include a shutterassembly, a shutter release button 45, focusing mechanisms, and aphotosensing system for automatically determining the correct exposurefor a given scene to be photo graphed.

Referring to FIGS. 2 and 3, there are shown several of the individualcomponents contained within exposure control housing 18. Focusing iscarried out by manual rotation of a geared focus wheel 46 located on oneside of exposure control housing 18. A segment of focus wheel 46 extendsthrough a slot in an upper portion of housing 18. Rotation of focuswheel 46 is translated to a peripheral gear structure 62 located on lensassembly 36 through an idler gear 48 interposed between the two (seeFIG. 3). Focus wheel 46 is connected to a follow-focus system showngenerally at 50 by mechanical linkages (not shown). Described andclaimed in a copending application for United States Patent entitledApparatus and System for Flash Photography by Lawrence M. Douglas, Ser.No. l68,67 I, filed Aug. 3, 1971 and assigned in common herewith,follow-focus system 50 is operative to regulate aperture size inrelation to subject distance when camera 10 is in a flash mode ofoperation.

Extending along the top portion of exposure control housing 18 is a trimlink 52. Trim link 52 is connected to follow-focus system 50 throughmechanical linkages shown generally as dashed line 54. Pivoted forrotation about a pin 56, trim link 52 establishes a connection betweenfollow-focus system 50 and a trim assembly shown generally at 58.

Referring additionally to FIG. 4, the internal components of trimassembly 58 are revealed in more elaborate detail. Positioned on rearcasting of exposure control housing 18 is a photocell lens 60. Photocelllens 60 is a forward component of a photosensing system, the remainingcomponents of which are not shown. Photocell lens 60 directs light froma scene into a photosensing system for regulating exposure in accordancewith scene brightness levels. Positioned in front of photocell lens 60are the individual components of trim assembly 58.

Manual adjustment of trim assembly 58 is carried out through therotation of a trim wheel shown generally at 64. Wheel 64 is formedhaving a segmented gear portion 66, a hollowed cylindrical axial portion68 and a lower geared portion 70. The uppermost part of segmented gearportion 66 extends through an opening 72 formed within rear casting 140of exposure control housing 18. Trim wheel 64 may be rotated by thecamera user by virtue of the extension of portion 66 through the top ofhousing 18. The inner diameter of hollowed portion 74 of cylindricalportion 68 is substantially equal to that of photocell lens 60.Accordingly, light from a scene is permitted to pass directly throughtrim wheel 64 and into photocell lens 60.

Positioned between lens 60 and trim wheel 64 is a trim wedge 76. Trimwedge 76 is formed having upper and lower portions 78 and 80,respectively. Lower portion 80 is formed having a geared portion 82engageable with lower geared portion 70 of trim wheel 64. Upper portion78 of trim wedge 76 is configured having two optically translucentportions 86 and 88. Translucent portions 86 and 88 are formed of afiltering material having selected different transmissibilities. Theseportions 86 and 88 are moved into and out of covering relationship withphotocell lens 60 in response to the manual rotation of trim wheel 64.Additionally included on trim wedge 76 is a trim reset plate pin 84, theoperation of which will be discussed below.

Trim assembly 58 provides the camera user with a one stop darken to aone stop lighten trim. For instance, when photocell lens 60 is halfcovered by translucent portion 88 and half uncovered, trim assembly 58is in a normal setting. When trim wedge 76 is rotated so that lens 60 isfully uncovered, trim assembly 58 is in a one-half stop darken setting.Likewise, full covering of lens 60 by portion 88 represents a one-halfstop lighten setting and one-half covering by portion 88 and one-halfcovering by portion 86 represents a one stop lighten setting.

Trim wheel 64 and trim wedge 76 are pivotally supported by a mountingplate 90. Mounting plate 90 is secured to exposure control housing 18 bytwo bolts 92 and 94, extending, respectively, through holes 96 and 98.Bolts 92 and 94 engage threaded holes 100 and 102 formed within rearcasting 140.

Located on the upper portion of mounting plate 90 is a trim wheelmounting hole 104. Hole 104 is configured as a bearing surface forsupporting cylindrical portion 68 of trim wheel 64. Cylindrical portion68 is retained within hole 104 by a ring 106 frictionally retained overthe front of portion 68. Positioned in front of ring 106 is a glass lensand casing assembly 130. As sembly 130 is mounted through a frontcoverplate 142 (see FIG. 1) of exposure control housing 18 and providesa transparent protective seal for the components of trim assembly 58.

Mounting plate 90, secured to rear casting 140 of housing 18, isconfigured to pivotally support both trim wedge 76 on its rearward sideand a trim reset plate 112 on its forward side. An arcuate slot 108,formed within mounting plate 90, is configured to receive trim resetplate pin 84 of trim wedge 76. Pin 84 extends through arcuate slot 108and engages a slot 131 formed within reset actuator 112. Pivotal supportfor trim .wedge 76 is provided by a wedge pivot or stud 114, ex-

tending through a hole 116 formed with wedge 76 and supported from bore124 formed within mounting plate 90. Reset actuator 112 is pivotallysupported on mounting plate 90 by a pin 113 extending through a bore 120formed in actuator 112 to a bore 115 formed in plate 90. Actuator 112includes a foot portion 122, an extension 126, a first cam surface 128,a second cam surface 129 and a slot 131. Slot 131 is located as toreceive trim pin 84 of trim wedge 76. Mounted on the left side ofmounting plate 90'is a leaf spring 146. Leaf spring 146 is engageablewith extension 126 of reset actuator 112 for biasing actuator 112 in acounterclockwise direction about pivot 113 during select portions of itsmovement. When wedge 76 is rotated about pivot 114, pin 84 moves alongarcuate slot 108 causing rotation of trim reset plate 112 due to theconnection between pin 84 and slot 131.

As may be readily evidenced from the foregoing, movement of pin 84within arcuate slot 108 rotates reset actuator 112 about its pivot 113.Specifically, movement of trim wedge 76, to either a lighten or darkenposition, causes pin 84 to leave slot 131 of actuator 112 and ride alongeither one of cam surfaces 128 or 129. Should trim assembly 58 belightened, pin 84 is pivoted to the left side of slot 108 and engagescam surface 128 of actuator 112. Similarly, a darkening of trim assembly58 causes pin 84 to move to the right side of slot 108 thereby engagingcam surface 129. In both cases, however movement of pin 84 along eithercam surface 128 or 129 cams actuator 112 counterclockwise about pin 113.A counterclockwise rotation of actuator 112 moves foot 122 downward intoa slot 132 provided in the lower portion of rear casting 140 of housing18. When in this position, foot 122 provides for the return operation oftrim assembly 58.

Should the camera user desire to adjust for trim, he merely rotates trimwheel 64 from segmented gear portion 66. Since a functional parityexists between both the lighten and darken operations of trim assembly58, only one of the two will be discussed, i.e., the lighten operation.In order to provide for a lighten trim, the camera user rotates trimwheel 66 a select amount in a clockwise direction. Due to the gearedconnection between trim wheel 64 and trim wedge 76, clockwise rotationof the former results in a counterclockwise rotation of the latter.Accordingly, translucent portions 88 and 86 are selectively placed infront of photocell lens 60, and the cameras photosensing system operatesin accordance with the lower light levels it sees. Counterclockwiserotation of trim wedge 76 about pivot 114 results in a similar movementof trim reset plate pin 84 along arcuate slot 108. Due to the engagementof pin 84 with cam surface 128, reset plate 112 is cammed in acounterclockwise manner about pin 113, thereby moving foot 122 throughslot 132 of exposure control housing 18. The distance which foot 122extends below the bottom face of rear casting 140 of housing 18 dependsupon the amount to which trim assembly 58 has been adjusted.

Trim assembly 58 will remain in this lighten position until the camerauser returns it to its neutral position. Since the camera user is oftennegligent in returning the trim assembly to its normal predeterminedposition, an automatic return feature is provided which becomesoperative upon the folding of camera 10.

Referring to FIG. 1, as camera 10 is folded, exposure control housing 18is pivoted counterclockwise about axis 26, thereby pivoting hingebracket 27 and its extension 29 about pin 31. Counterclockwise rotationof housing 18 and hinge bracket 27 continues until foot 122 is engagedby extension 137 of light baffle 135. Upon contacting extension 137,foot 122 and reset actuator 112 are rotated clockwise about pin 113 (seeFIG. 3), due to forces derived from the folding of camera 10. Aclockwise rotation of actuator 112 causes cam surface 128 to rotateclockwise. Due to the engagement between surface 128 and pin 84,clockwise rotation of the former results in a camming action on pin 84moving pin 84 along arcuate slot 108 to the right. This movement of pin84 to the center of arcuate slot 108 also returns trim wedge 76 to itspredetermined normal position. During the folding operation, extension137 of baffle 135 is moved into slot 132 forcing foot 122 upward intoslot 132 past the bottom plane of exposure housing 18. It should benoted that foot 122 need only be moved a relatively small amount inorder to return actuator 112, pin 84 and trim wedge 76 to theirpretrimmed normal positions. An overtravel for foot 122 is provided,however, for insuring the full return of actuator 112 and pin 84. Whenfoot 122 and actuator 112 have been fully returned by extension 137, camsurface 128 has moved pin 84 to the center of arcuate slot 108 and intothe bottom portion of slot 131 of actuator 112. As may be evidenced fromFIG. 2, extension 137 of baffle 135 remains in slot 132 while the camerais in its folded position. When camera 10 is again erected, extension137 is retracted from slot 132 to permit actuation of trim assembly 58.When camera 10 is again erected, pin 84 is positioned at the bottom ofslot 131 of actuator 112 and is captured by it. Specifically, the slopesof cam surfaces 128 and 129 at the bottom of slot 131 are too steep topermit movement of pin 84 to move actuator 112. Leaf spring 146,positioned on mounting plate 90, is operative to pivot actuator 112counterclockwise and move the bottom of slot 131 away from pin 84,thereby permitting movement of pin 84 along either cam surface 128 or129 when the trim assembly 58 is again actuated. An end 150 of spring146 is engaged by the top of extension 126 of actuator 112 when thecamera is folded and is forced upwardly against the bias of spring 146.This energy is stored in spring 146 until camera 10 is again erected.Spring 146 cannot move actuator 112 when the camera is folded becauseextension 137 of baffle 135 retains foot 122 in its upwardmost position.When camera 10 is erected, however, and extension 137 is removed fromslot 132, the energy stored in spring 146 is operative to rotateactuator 112 counterclockwise through extension 126.

Thus maneuvered during the folding procedure, the trim assembly 58 isdriven automatically to its predetermined normal position. In moredetail, the clockwise return rotation of reset actuator 112 duringfolding causes a corresponding rotation of trim reset pin 84 and trimwedge 76 to their neutral positions. Correspondingly, as trim wedge 76is rotated clockwise, there is a resultant counterclockwise rotation totrim wheel 64, returning trim assembly 58 to its normal position.

As may be evidenced from the foregoing, the automatic normal returnoperation of trim assembly 58 depends upon the folding of exposurecontrol housing 18 into its nested orientation. Should the camera userneglect to return the trim assembly to its predetermined normalposition, the present invention will do so automatically when the camerais folded following its use.

Since certain changes may be made in the above apparatus withoutdeparting from the scope of the invention herein involved, it isintended that all matter contained in the above description or shown inthe accompanying drawings shall be interpreted as illustrative and notin a limiting sense.

What is claimed is:

l. Photographic apparatus for exposing photosensitive material, saidapparatus comprising:

a plurality of housing members interconnected for movement between anerected configuration for forming an exposure chamber, and a. foldedconfiguration;

control means, disposed within at least one of said housing members, forregulating the exposure of said photosensitive material, said controlmeans including manually adjustable trim means bidirectionally movablefrom a predetermined normal position for selectively varying theresponsiveness of said control means; and

trim reset means for returning said trim means to its said predeterminednormal position in response to movement of said housing members from oneof said configurations to the other of said configurations, said trimreset means including reset actuator means coupled in mutual movablerelationship with a portion of said manually adjustable trim' means,said reset actuator means being unidirectionally movable in response tosaid bidirectional movement of said manually adjustable trim means.

2. The photographic apparatus of claim 1 in which said reset actuatormeans is provided with a predetermined amount of overtravel for insuringthe return of said manually adjustable trim means to its predeterminednormal position in response to said movement of said housing membersfrom one of said configurations to the other of said configurations.

3. The photographic apparatus of claim 1 in which said reset actuatormeans is provided with a predetermined amount of overtravel for insuringthe return of said manually adjustable trim means to its predeterminednormal position in response to said movement of said housing membersfrom said erected configuration toward said folded configuration.

4. Photographic apparatus for exposing photosensitive material, saidapparatus comprising:

a plurality of housing members interconnected for mutual movementbetween an erected configuration for forming an exposure chamber, and afolded configuration;

movable light shielding means for preventing actinic light fromimpinging on said photosensitive material during the movement of saidphotosensitive material from within said photographic apparatus towithout said photographic apparatus, said light shielding means beingpivotally coupled to one of said housing members;

control means, disposed within at least one of said housing members, forregulating the exposure of said photosensitive material, said controlmeans including manually adjustable trim means bidirectionally movablefrom a predetermined normal position for selectively varying theresponsiveness of said control means; and

trim reset means for returning said trim means to its said predeterminednormal position in response to movement of said housing members from oneof said configurations to the other of said configurations, said trimreset means including reset actuator means coupled in mutual movablerelationship with a portion of said manually adjustable trim means, saidreset actuator means being unidirectionally movable in response to saidbidirectional movement of said manually adjustable trim means.

5. The photographic apparatus of claim 4 in which said light shieldingmeans is pivotally foldable from an erected configuration to a foldedconfiguration in response to movement of said housing members from saiderected configuration to said folded configuration.

6. The photographic apparatus of claim in which said housing membersinclude an exposure control housing member movable from an erectedposition to a folded position for establishing said foldedconfiguration; and

said trim reset actuator means is configured and arranged within saidexposure control housing member so that a portion of said trim resetactuator means is driveably contactable with a portion of said lightshielding means when said exposure control housing member is moved toestablish said folded configuration.

7. The photographic apparatus of claim 6 in which said portion of saidlight shielding means contactable with said portion of said trim resetactuator means is an extension formed on a select portion of said lightshielding means.

8. The photographic apparatus of claim 7 in which said exposure controlhousing member includes slot means located therein for permitting saiddriveable contact between said portion of said trim reset actuator meansand said extension of said light shielding means.

9. The photographic apparatus of claim 8 in which said portion of saidtrim reset actuator means is movable into said slot means when saidreset actuator means is unidirectionally moved in response to saidbidirectional movement of said manually adjustable trim means.

10. The photographic apparatus of claim 9 in which said extension ofsaid light shielding means is movable into said slot means for driveablycontacting said portion of said trim reset actuator means to return saidtrim reset actuator means to its predetermined normal position in adirection opposite said unidirectional movement of said trim resetactuator means for moving said manually adjustable trim means to itssaid predetermined normal position through said portion of said manuallyadjustable trim means in response to said folding of said lightshielding means when said housing members are moved from said erectedconfiguration to said folded configuration.

11. The photographic apparatus of claim 10 in which said extension ofsaid light shielding means is moved into said slot means and provides apredetermined amount of overtravel movement to said portion of said trimreset actuator means and said trim reset actuator means for insuringsaid return of said trim reset actuator means to its predeterminednormal position and for insuring the return of said manually adjustabletrim means to its said predetermined normal position in response to saidmovement of said light shielding means and housing members from saiderected configuration to said folded configuration.

12. The photographic apparatus of claim 11 in which said trim resetmeans includes spring means, engageable with a second portion of saidtrim reset actuator means, for absorbing a select amount of energy fromsaid overtravel movement of said trim reset actuator means when saidextension of said light shielding means is moved into said slot, saidspring means being operative to move said trim reset actuator means anamount equal to and opposite said predetermined amount of overtravel forpermitting actuation of said manually adjustable trim means when saidhousing members are again moved to said erected position.

13. The photographic apparatus of claim 12 in which said manuallyadjustable trim means includes a trim wheel pivotally mounted withinsaid exposure control housing member, having a manually contactablefirst radial periphery and a second drive periphery pivotal incorrespondence therewith; a trim component movable correspondence withsaid second periphery for selectively affecting the responsiveness ofsaid control means; and said trim reset actuator means associated inmutually driven relationship with said trim wheel at said secondperiphery and with said trim component.

14. The photographic apparatus of claim 13 wherein said trim componentis mounted for pivotal movement within said exposure control housingmember and is Y driveably connected with said trim wheel secondperiphery and with said trim reset actuator means.

15. Photographic apparatus for exposing photosensitive material, saidapparatus comprising:

means defining housing members interconnected for movement between anerected configuration for forming an exposure chamber, and a foldedconfiguration; control means, disposed within at least one of saidhousing members, for regulating the exposure of said photosensitivematerial, said control means including manually adjustable trim meansmovable from a predetermined position for selectively varying theresponsiveness of said control means; and

trim reset means for returning said manually adjustable trim means tosaid predetermined normal position in response to the movement of saidhousing members from one of said configurations to the other of saidconfigurations, said trim reset means being provided with an amount ofovertravel sufficient to insure the return of said manually adjustabletrim means to its said predetermined normal position, said trim resetmeans including spring means for counteracting said overtravel to saidmanually adjustable trim means when said housing members are moved fromsaid folded configuration to said erected configuration.

1. Photographic apparatus for exposing photosensitive material, saidapparatus comprising: a plurality of housing members interconnected formovement between an erected configuration for forming an exposurechamber, and a folded configuration; control means, disposed within atleast one of said housing members, for regulating the exposure of saidphotosensitive material, said control means including manuallyadjustable trim means bidirectionally movable from a predeterminednormal position for selectively varying the responsiveness of saidcontrol means; and trim reset means for returning said trim means to itssaid predetermined normal position in response to movement of saidhousing members from one of said configurations to the other of saidconfigurations, said trim reset means including reset actuator meanscoupled in mutual movable relationship with a portion of said manuallyadjustable trim means, said reset actuator means being unidirectionallymovable in response to said bidirectional movement of said manuallyadjustable trim means.
 2. The photographic apparatus of claim 1 in whichsaid reset actuator means is provided with a predetermined amount ofovertravel for insuring the return of said manually adjustable trimmeans to its predetermined normal position in response to said movementof said housing members from one of said configurations to the other ofsaid configurations.
 3. The photographic apparatus of claim 1 in whichsaid reset actuator means is provided with a predetermined amount ofovertravel for insuring the return of said manually adjustable trimmeans to its predetermined normal position in response to said movementof said housing members from said erected configuration toward saidfolded configuration.
 4. Photographic apparatus for exposingphotosensitive material, said apparatus comprising: a plurality ofhousing members interconnected for mutual movement between an erectedconfiguration for forming an exposure chamber, and a foldedconfiguration; movable light shielding means for preventing actiniclight from impinging on said photosensitive material during the movementof said photosensitive material from within said photographic apparatusto without said photographic apparatus, said light shielding means beingpivotally coupled to one of said housing members; control means,disposed within at least one of said housing members, for regulating theexposure of said photosensitive material, said control means includingmanually adjustable trim means bidirectionally movable from apredetermined normal position for selectively varying the responsivenessof said control means; and trim reset means for returning said trimmeans to its said predetermined normal position in response to movementof said housing members from one of said configurations to the other ofsaid configurations, said trim reset means including reset actuatormeans coupled in mutual movable relationship with a portion of saidmanually adjustable trim means, said reset actuator means beingunidirectionally movable in response to said bidirectional movement ofsaid manually adjustable trim means.
 5. The photographic apparatus ofclaim 4 in which said light shielding means is pivotally foldable froman erected configuration to a folded configuration in response tomovement of said housing members from said erected configuration to saidfolded configuration.
 6. The photographic apparatus of claim 5 in whichsaid housing members include an exposure control housing member movablefrom an erected position to a folded position for establishing saidfolded configuration; and said trim reset actuator means is configuredand arranged within said exposure control housing member so that aportioN of said trim reset actuator means is driveably contactable witha portion of said light shielding means when said exposure controlhousing member is moved to establish said folded configuration.
 7. Thephotographic apparatus of claim 6 in which said portion of said lightshielding means contactable with said portion of said trim resetactuator means is an extension formed on a select portion of said lightshielding means.
 8. The photographic apparatus of claim 7 in which saidexposure control housing member includes slot means located therein forpermitting said driveable contact between said portion of said trimreset actuator means and said extension of said light shielding means.9. The photographic apparatus of claim 8 in which said portion of saidtrim reset actuator means is movable into said slot means when saidreset actuator means is unidirectionally moved in response to saidbidirectional movement of said manually adjustable trim means.
 10. Thephotographic apparatus of claim 9 in which said extension of said lightshielding means is movable into said slot means for driveably contactingsaid portion of said trim reset actuator means to return said trim resetactuator means to its predetermined normal position in a directionopposite said unidirectional movement of said trim reset actuator meansfor moving said manually adjustable trim means to its said predeterminednormal position through said portion of said manually adjustable trimmeans in response to said folding of said light shielding means whensaid housing members are moved from said erected configuration to saidfolded configuration.
 11. The photographic apparatus of claim 10 inwhich said extension of said light shielding means is moved into saidslot means and provides a predetermined amount of overtravel movement tosaid portion of said trim reset actuator means and said trim resetactuator means for insuring said return of said trim reset actuatormeans to its predetermined normal position and for insuring the returnof said manually adjustable trim means to its said predetermined normalposition in response to said movement of said light shielding means andhousing members from said erected configuration to said foldedconfiguration.
 12. The photographic apparatus of claim 11 in which saidtrim reset means includes spring means, engageable with a second portionof said trim reset actuator means, for absorbing a select amount ofenergy from said overtravel movement of said trim reset actuator meanswhen said extension of said light shielding means is moved into saidslot, said spring means being operative to move said trim reset actuatormeans an amount equal to and opposite said predetermined amount ofovertravel for permitting actuation of said manually adjustable trimmeans when said housing members are again moved to said erectedposition.
 13. The photographic apparatus of claim 12 in which saidmanually adjustable trim means includes a trim wheel pivotally mountedwithin said exposure control housing member, having a manuallycontactable first radial periphery and a second drive periphery pivotalin correspondence therewith; a trim component movable correspondencewith said second periphery for selectively affecting the responsivenessof said control means; and said trim reset actuator means associated inmutually driven relationship with said trim wheel at said secondperiphery and with said trim component.
 14. The photographic apparatusof claim 13 wherein said trim component is mounted for pivotal movementwithin said exposure control housing member and is driveably connectedwith said trim wheel second periphery and with said trim reset actuatormeans.
 15. Photographic apparatus for exposing photosensitive material,said apparatus comprising: means defining housing members interconnectedfor movement between an erected configuration for forming an exposurechamber, and a folded configuration; control means, disposed within atleast one of said housing members, for regulating the exposure of saidphotosensitive material, said control means including manuallyadjustable trim means movable from a predetermined position forselectively varying the responsiveness of said control means; and trimreset means for returning said manually adjustable trim means to saidpredetermined normal position in response to the movement of saidhousing members from one of said configurations to the other of saidconfigurations, said trim reset means being provided with an amount ofovertravel sufficient to insure the return of said manually adjustabletrim means to its said predetermined normal position, said trim resetmeans including spring means for counteracting said overtravel to saidmanually adjustable trim means when said housing members are moved fromsaid folded configuration to said erected configuration.